[Ongoing] Google (NSDQ: GOOG) is giving Gmail a social refresh, introducing, as expected, a new feature that makes it easy for users of the e-mail service to share updates. A new tab in Gmail called ‘Buzz,’ which goes live today, automatically shows updates from contacts users communicate with the most. Users can share updates—text updates, photos, or links—either with select contacts or across the web.

More to come.